Pixel Art Challenge: Game Boy Turns 20

Last week was the 20th anniversary of the release of the Game Boy in Japan. To celebrate we want you to create your own original Classic Game Boy game. This means an original game that did not exist.

Your challenge entry must include the title screen and at least one in-game screen. You may include extra in-game screens if you want.

Canvas Size - 160 (width) x 144 (height) per screen. Make sure you submit all of your screens together on the same canvas. Minimum 2 screens.
Colours - Use only colours from the provided palette (you may also use transparency between screens):

Nintendo's Original Gameboy used 4 levels of grey only. This challenge is a celebration of the Gameboy. The palette is 'look and feel', some screens are yellower, others realm into ochers and browns. Just work with this green, k.

The challenge thread will have all the challenge updates. The thread is also a great place to post your WIPs.

Christ you guys. You'd have to be completely braindead to think "your own original" meant anything other than what it says. It took about 3 seconds for half the commenters to find a loophole. Use your brain and try to figure out what the writer of the challenge is ASKING for, not what technically works due to an argument based on semantics.

I think the goal is really the 160x144 mockups, transparency is expressly allowed so you can then arrange them as you prefer, vertically, horizontally, etc. and let the user choose his BG color with the pj theme.